Occultation event with (5119) Imbrius, event index number 4727
Regions able to see the event: Europe
Geocentric closest approach at 2026/11/17 01:19:45 UTC
J2000 position of star is 06:08:05.5 +38:23:21
Equinox of date position of star is 06:09:56.6 +38:23:00
Star is 130 degrees from the moon. Moon is 46% illuminated.
Stellar brightness G=16.9, apparent brightess of occulting body is G=15.6
Use an exposure time of 1.95 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 22% with SNR of 0.7 for the occulted depth (per occulted point)
Apparent velocity is 12.2 km/sec on the sky relative to the star, or, 13.3 arcsec/hr.
Position angle of asteroid motion is 100.6 degrees
The recommended exposure time corresponds to 23.7 km per image.
The 1-sigma error in the time of the event is 1.0 seconds.
The 1-sigma cross-track error in the shadow position is 29.5 km.
The sky-plane scale is 3287.8 km/arcsec.
Diameter estimates:
51.8 km assuming a 5% albedo, maximum of 4.3 sec for a central chord
21.1 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 49.3 km used for deployment plan.
Star training set for 5119_Imbrius, (2026/11/17 01:20UT) Object RA Dec mag sep mel Pollux 07:46:57.5 +27:57:32 1.1 22.72 153 34Bet Aur 06:01:30.1 +44:56:50 1.9 6.75 127 40 Aur 06:08:26.3 +38:28:39 5.4 0.31 130 PPM 071285 06:11:25.3 +38:17:21 7.7 0.30 131 5119_Imbrius 06:09:56.6 +38:23:00 15.6 131 Positions are for equinox of date
Star training set for 5119_Imbrius, (2026/11/17 01:20UT) Object RA Dec mag sep mel Pollux 07:45:17.7 +28:01:33 1.1 22.72 153 34Bet Aur 05:59:31.6 +44:56:51 1.9 6.75 127 40 Aur 06:06:35.1 +38:28:56 5.4 0.31 130 PPM 071285 06:09:34.3 +38:17:45 7.7 0.30 131 5119_Imbrius 06:08:05.5 +38:23:21 15.6 130 Positions are for J2000